The most reasonably priced component used on the Kd125-a2 1976 Usa Canada Crankshaft/piston/rotary Valve is the Circlip-piston Pin.
The most expensive part in this assembly is the Crankshaft-comp.
With a quantity of two pieces, the Circlip-piston Pin is the most used part in the CRANKSHAFT/PISTON/ROTARY VALVE diagram.